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. 2009 Oct 20;2(1):30.
doi: 10.1186/1755-7682-2-30.

Blood pressure lowering treatment for preventing stroke recurrence: a systematic review and meta-analysis

Shaheen E Lakhan  1 , Michael T Sapko
Affiliations

Blood pressure lowering treatment for preventing stroke recurrence: a systematic review and meta-analysis

Shaheen E Lakhan et al. Int Arch Med. .

Abstract

Background: While hypertension is a leading risk factor for an initial stroke, the role of blood pressure lowering to prevent subsequent stroke is less clear. The results of recent large clinical trials investigating effects of antihypertensive agents in patients with a history of stroke have not shown a significant benefit; findings that are at odds with previous data. Our meta-analysis systematically evaluates the available, relevant trials to examine the role of antihypertensive drugs in preventing recurrent stroke.

Methods: MEDLINE, CENTRAL, and ClinicalTrials.gov were systematically searched and bibliographies from key reports were examined. All randomized, placebo-controlled trials that tested blood pressure lowering agents in patients with stroke or transient ischemic attack were identified. The results from these trials were combined and meta-analyses were performed.

Results: Ten studies were found to contain relevant endpoints and presented data allowing meta-analysis. Agents that lowered blood pressure reduced recurrent stroke (OR 0.71, 95% CI 0.59-0.86, P = 0.0004) and cardiovascular events (OR 0.69, 95% CI 0.57-0.85, P = 0.0004) in patients with a previous stroke or TIA. These agents did not affect the rate of myocardial infarction (OR 0.86, 95% CI 0.73-1.01, P = 0.07) or all-cause mortality (OR 0.95, 95% CI 0.83-1.07, P = 0.39) in this patient population.

Conclusion: Despite recent large trials showing no significant effect, in patients that have experienced a TIA or stroke, blood pressure lowering agents reduced the occurrence of subsequent stroke and cardiovascular events. The rate of myocardial infarction and all-cause mortality was unchanged.

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Figures

Figure 1
Figure 1
Flow diagram of included studies.
Figure 2
Figure 2
Funnel plot comparison of studies examining the effect of blood pressure lowering agents on the risk of recurrent stroke. One study, BPLPRS, fell outside of the 95% confidence region.
See this image and copyright information in PMC

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